Is it true that Project X shafts are not frequency matched ever and their stiffness in a set is all over the place?

This is what my club maker told me when he tested the frequency of my set and his other customers.

Are you talking about Project X Flighted shafts? If so, here's what True Temper says about them:

Project X Flighted
In addition to the playing characteristics that have made the Project X shaft a tour favorite, the Project X Flighted features an exaggerated change in kick point within each shaft throughout the set to optimize ball flight through the bag. Long irons provide a lower kick point for higher ball flight, easier launch and greater distance, while the short irons have a higher kick point for a lower trajectory, greater accuracy and control.